<span>objective means factual, and considering the other three contain
words that are considered opinion based they are subjective phrases. </span>
The Spanish conquistadors believed them to be infidels. They would read them a note from the Pope in Spanish that they wouldn't understand in which they would proclaim that their land would now be Spanish because Spain is governed by one true God, and after that they would slaughter them if they wouldn't surrender.
You didn't provide a list of choices, but I'll provide a key example: The US intervention in Korea. In Korea, when communist forces from the North invaded the South in 1950, the United States intervened (with United Nations backing), battled to keep South Korea free and democratic, and were able to do so. The Soviet Union did not play an active, open role in that war, but did covertly supply <span>material services to the North Korean side, as well as Soviet pilots and aircraft. Keeping communism from spreading in Korea was a way the US was practicing its policy of containment over against Soviet communist influence.</span>
Answer:
D. A pandemic of European diseases destroyed Native American cultures before information could be gathered.